
package es.upm.dit.gsi.opactv.servlets;

import es.upm.dit.gsi.opactv.Session;
import es.upm.dit.gsi.opactv.Sessions;
import es.upm.dit.gsi.opactv.util.JSON;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.NoSuchElementException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CloseSession extends HttpServlet {

    private JSON json = new JSON();
   
    protected void processRequest(HttpServletRequest request,
    HttpServletResponse response) {
        response.setContentType("application/json; charset=UTF-8");
        PrintWriter out = null;
        try {
            out = response.getWriter();
            if (request.getMethod().equals("POST")) {
                BufferedReader br = request.getReader();
                String line, requestContent="";
                while ((line=br.readLine())!=null) {
                    if (requestContent.length()<1000) requestContent += line;
                    else break;
                }
                br.close();
                String sid = json.getValue(requestContent, "sid");
                if (sid!=null) {
                    Session session = Sessions.getSessionBySID(sid);
                    if (session!=null) {
                        Sessions.deleteSessionBySID(sid);
                        String msg = "The session was closed";
                        out.println(json.sessionToJSON("message", msg));
                    } else {
                        String error = "The SID parameter is invalid";
                        out.println(json.errorToJSON("invalid_param", error));
                    }
                } else {
                    String error = "The request content is not JSON";
                    out.println(json.errorToJSON("invalid_input", error));
                }
            }
            out.close();
        } catch (NoSuchElementException ex) {
            String error = "La consulta tiene que tener todos los campos.";
            out.println(json.errorToJSON("invalid_input", error));
        } catch (Exception ex) {
            // EXCEPCION
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
